Answer: food.
- A food
- B water
- C oxygen only
- D soil
Correct answer: A. food
Explanation: Plants synthesise glucose (food) from CO₂ and water using light.
Simplified photosynthesis diagram: light energy, CO2, and H2O enter the leaf and are converted in the chloroplast into glucose and O2.
Concept context
Light reactions, the Calvin cycle, C 3 /C 4 /CAM pathways, photorespiration, and factors affecting the rate of photosynthesis. One of the highest-yield NEET chapters.